I believe the answer is theoretical model
A theoretical model is the foundation that could be held to support a certain theory for a certain research or study.
From the example above, the study is build on a foundation that both behavior and environmental factor could affect the subjects' overall health
It had a strong central government, powerful military, and location on prosperous trade routes. They also brought peace to a huge part of the land around them, creating new trade routes.
Answer: An example of how individual actions are constrained by sociological circumstances is (D) David's decision to abstain from eating pork because his religion demands it.
Explanation: The concept "sociological circumstance" is used to refer to<u> the social factors, such as ideas, principles or activities, that surround and have an influence on a particular individual.</u> In that way, sociological circumstances limit a person's behaviour and actions. David's decision to abstain from eating pork because his religion demands it is an example of a constraint generated by a sociological circumstance because<u> the principles of the religion he believes in and that surrounds him restrict his choices.</u> In other words, <u>his religion limits the way in which David is supposed to act and eat. </u>
Because the most important things are not forgotten
Soul,nitrogen, potassium and phosphorus ...Hopefully it helps